Road and method of building same.



' protective coverin AMZI L. BARBER, OF WASHINGTON,

BARBER ASPHALT (:OllilANY, Ol NEW TRIOT Ol COLUMBIA.

DISTRICT OF COLUMBIA, AS YORK, N. r, A

srenor. con ronarron ROAD AND METHOD OF BUILDING SAME.

Application filed January To all whom it may concern:

Be 1t known that l, null 11.

BARBER, a citizen ot the Unit ed States, residing in the city of vl'ashingtou, District of Columbia, have invented certain new and useful Inn movements in heads and liuilding the Same, a specification.

This invention relates to an imprommei'it in roads and the method of building the same and is particularly adapted to the construe tion of country roads as distinguished from roads in cities, towns and villages.

There are two points to be specifically considered in the construction of a read, the foundation or pavement pro 'icr and its covering. The foundation should be stable and is usually constructed of stone or gravel of various kinds and sizes, laid and rolled in various ways. Such foundation is of rigid and unyielding material which, fractured or ruptured in any way will rapidly disintegrate 0r ravel. To protect the material of the foundation or pavement proper from fracture and consequent disintegration; it is customary totop dress the road with sand, gravel or screenings of various kinds generally in connection with a binding material to hold the particles together as far as possible. These top dressings are unstable, are blown away by the wind in the form of dust and are carried away by the rains, thus again exposing the foundation or pavement proper to Wear and injury. The best wearing top dressing, on account of its hard and finely divided character, is sand but has been how to keep it in place on the road. This problem has become acute since the advent of the automobile with its great speed and consequent destructive power on the road sin-fa the protective covering of the road being rapidly removed in the form of dust. The tires of automobiles exercise a sucking effect on the. binding material of this g, distribute it as dust over the surrounding country, disintegrate the road and ultimately destroy it. Many attempts have been made'to preserve the roads from this kind of injury, but such attempts up to the present have resulted only in expedicnts of a temporal or evanes cent character, requiring constant care and watchfulncss and fi'equent repetition of the remedy. J

In building long country roads, such as of which the following is the il ctl 5d of,

the problem f f trunk and post roads connccti cities, it is p'racticall enormous and prohibiti tain the surface l l l l i l l l Specification of Letters Patent.

tion, a Tl en ewe ubstai ticles of tl the form The ve exp of the same in hree of the road must d or continuously tre; ice adaptcd to, prev is surface from l of dust or otheru" attempts heretofore protect; y be grouped under character.

Fl rs t other 12 leaving Second, treating tl with an oil emulsion. and has a bad odor. Third, treating with or tives. of plan of persons using the road applied moistening the road quid. Theliq the road. surl ude petroleum or some This has a bad ode ts, paint on vehicles an to the road and when is thrown up in the mud.

Four

with coal tar,

tions 0 similar The foregoing resum given to emphasize th 1 Hip l'O V entirely toward the surfac e the pro require It might e i th, treating the surfac its derivatives ontaining effect to crude petrolei nor reduce condition o1 the country roads States is one the agr It is no and that the expe very great in coniparis hauling over Statistics she cost of roads is ten cents while in t of the most 1 icultural develo lJOIIOUS the.

on with the country roa w that in Europ hauling a ton a mile the average cost of hauling a tWentv-five cents. tatistics that th e average haul in the U roads have heretofore 1 the fine par- .ig removed 1n consideration of ca ts temporary or otherwise r and both )l'eservatio p'rnent of the t our country r use of hauling over them 1s TO THE A. L. OF THE DIS- Patented March 13, 1909. 19, 1909. Serial No. 473,100.

ng the various y impossible, except, at

ense, to mainroper condibeen built. be constantly ed with some dc to prevent covering of our headings ch will show objectionable with water or the surface of the road of its derivais destructive d the clothing when freshly after a rain it e of the road and prepara- This has a somewhat been directed n of the loose and not toward the ideal road which should be permanent and indestructible and neither rface layer.

note that the in the United tant factors in country. ends are bad the expense of ds of Europe. e the average over the country United States ton a mile is further show nited States is macadam part of the roadu ay as new, if desired. Automobiles can run u ith one side on the asphalt and one side on the macadam, and so avoid any tendency to skid, if the asphalt is net uith rain. When automobiles meet. they usually slow doun, but in any case \i ould run upon the macadam only on one side and but for a feet. When the road is clear it sould be ideal for automobiles, smooth as a billiard table, u itli no ruts or lumps to look out: for. When on the us- 'phalt, the automobiles ill cause neither dust nor u ear. Finally, and if no other advan tags A ere to be gained, the farmers can haul on the asphalt more than double the load than they can on macadaln. This consider-in t-ion alone is of great it eight as hearing on the utility of the invention.

It is obvious that the iiulestructible strip ma. be of such uidth as desired, but at least id e enough to accommodate ordinary four wheeled vehicles, and may be at one side as well as in the center of the road, the essence of the invention residing in providing a permanent protective covering for a portion of the road surface which, in case of asphaltic or other bituminous concrete, is of a yielding,

- elastic or resilient character in cont-radisincreasing the phalticcharacter of the mate-- tinction to the rigid rial of the ordinary road/ Tlie terms asconcrete and l )itiuninous'concrete are int-ended to include asphalt-ic and bituminous cements whether mixed with broken stone, gravel, sand, pulverized limestone or other substance or not, as well as coal tar and residual pitch mixed with such materials. It is further obvious that by practicing the invention set forth the time of use of the road by the usual tratlic is rest-lyexpedited, as for example, a road finis red in the evening can'be thrown open to full traffic the follouing morning, thus avoiding the usual delaysas at present caused by the old methods of road building wherein the macadain must be left for several days to dry out and set. The invention also tends to equalize the nearing down of the road surface. While'the macadam or granular strip u ould Wear down more rapidly than the esphalt under equal conditions, thegreater amount of traificiwould be over the asphalt,

thus lessening the wear-on the macadam and wear on the asphalt proportionally.

What 1 claim and desire to secure by Letters Patent is:

1. A road comprising a suitable foundation, a lengths ise strip of fragmentary, granular material and another lengthu ise strip of smooth, substantially indest-ructil'ile mate-- rial at.least u'ide enough to accommodate an ordinary four-wh eled vehicle.

2. A road comprising a suitable 'foundation, a lengths ise strip of fragmentary, granular material at each side of the road and a side of the road .mg one part 0 the same with strip of smooth, substantially indestructible material intermediate the side strips and at least i ide enough to accommodate an ordinary four-r. heeled vehicle. v

A road comprising a suitable foundation, a. lcngthr ise strip of fragmentary, granular material and another lengthnisc strip of yielding material at least a ide enough to accouinualatcan ordinary four-u heeled vehicle.

4. road comprising a. suitable foundatiun, a length: ise strip of fragmentary, granular material at each side of the road and a strip of yielding material intermediate the side strips and at least aide enough to accommodate an ordinary four-r. heeled vehicle.

5. A road comprising a suitable foundation, a lengths ise strip of fragmentary, granular material at each side of the road and a strip of yielding, resilient material intermediate the side strips and at least a ide enou h to accommodate an ordinary four-wheeled vehicle. I g

6. A road comprising asuitable founda tion, a lengthuise strip of macadaiiiat each and a bituminous concrete strip intermediate the macadam strips and at least wide enough to accommodate an ordinary four-wheeled vehicle.

7. A road comprising a foundation, at protecting covering for one position of said read consisting of tragmentary. granular material and for another portion of said road consisting of a yielding, resilient, semi-elastic material, each of said coverings eirtendin lengthwise the road and at least Wide enoug 1 to. accommodate an ordinary four-wheeled vehicle.

8. A method of road construction e0nsisting in preparin a suitable foundation, cover-- fragmentary, granular material and another art with smooth, substantially indestructi le material, said coverings being arranged in parallel strips lengthuise'the roadand at 'least u'ide enoiwh to accommodate an ordinary fourwheeled vehicle. 7

9. A method of road construction consisting in preparing a suitable foundation, covering a lengthwise strip at each side of the road with fragmentary, granular material and insorting a strip of smooth, substantially indestructible material intermediate said side strips, said intermediate strip being at least wide enough to accommodate an ordinary four-wheeled vehicle.

10. A method of road construction consisting in preparing a suitable foundation, finishing a port-ion of the surface u ith frag mentary, granular material and inserting a strip of yielding material in said surface lengthwise the road and at least wide enough to acconnnodate an ordinary four-Wheeled vehicle. z

11. A method of road construction consisting in preparing a suitable foundation,

- side edges and inserting a bituminous eenj finishing the surface at the sides of the road I with fragmentary, ranular material and in" serting astrip'bf-yie ding materiel lengthwise t-he road inteh uediule the grenulm' strips and 1 I at least .Yide nlgughto accommodate an er- 1 eenstruetien 4011-. diniiry four-heeled vehicle. gid *oun-detien, pre- 12. A method of road (:onstruxr tien. 001xesumiaee .xithefmgsisting in prepming a suitable imnuieir "1, cringend enoaheifpep finishing the surface at the sides of the reed ring, said protesting with fragmentary, ranuhu' maimed and in- Uln me mad but serting a strip of ie ding, resiheut, semi-ch1seeeuznuodate an erg tic material lengtm ise the roadintermediate Llicle the granular strips and at least ide enough to accommodate an ordinary four-wheeled vehicle.

Leubum 12.1 e 1! presence 111., Mm. 501;.

13'. A method of road construction con 1 ,ijslijfiii.

sistin in preparing esuitable foundation; a maem amlzmg' the surface of the road at 2.210 v 

